diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index d77b6d290..e58d55da0 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -84,6 +84,7 @@
 	"NO_AGENCY_AVAILABLE": "No hay una zona de reparto disponible con estos parámetros",
 	"ERROR_PAST_SHIPMENT": "No puedes seleccionar una fecha de envío en pasado",
 	"The current ticket can't be modified": "El ticket actual no puede ser modificado",
+	"The current claim can't be modified": "La reclamación actual no puede ser modificada",
 	"The sales of this ticket can't be modified": "Las lineas de este ticket no pueden ser modificadas",
 	"Please select at least one sale": "Por favor selecciona al menos una linea",
 	"All sales must belong to the same ticket": "Todas las lineas deben pertenecer al mismo ticket",
diff --git a/modules/claim/back/methods/claim/isEditable.js b/modules/claim/back/methods/claim/isEditable.js
new file mode 100644
index 000000000..2e9991584
--- /dev/null
+++ b/modules/claim/back/methods/claim/isEditable.js
@@ -0,0 +1,41 @@
+module.exports = Self => {
+    Self.remoteMethodCtx('isEditable', {
+        description: 'Check if a claim is editable',
+        accessType: 'READ',
+        accepts: [{
+            arg: 'id',
+            type: 'number',
+            required: true,
+            description: 'the claim id',
+            http: {source: 'path'}
+        }],
+        returns: {
+            type: 'boolean',
+            root: true
+        },
+        http: {
+            path: `/:id/isEditable`,
+            verb: 'get'
+        }
+    });
+
+    Self.isEditable = async(ctx, id) => {
+        const userId = ctx.req.accessToken.userId;
+
+        const isSalesAssistant = await Self.app.models.Account.hasRole(userId, 'salesAssistant');
+
+        let claim = await Self.app.models.Claim.findById(id, {
+            fields: ['claimStateFk'],
+            include: [{
+                relation: 'claimState'
+            }]
+        });
+
+        const isClaimResolved = claim && claim.claimState().code == 'resolved';
+
+        if (!claim || (isClaimResolved && !isSalesAssistant))
+            return false;
+
+        return true;
+    };
+};
diff --git a/modules/claim/back/methods/claim/specs/isEditable.spec.js b/modules/claim/back/methods/claim/specs/isEditable.spec.js
new file mode 100644
index 000000000..ca419de4c
--- /dev/null
+++ b/modules/claim/back/methods/claim/specs/isEditable.spec.js
@@ -0,0 +1,33 @@
+const app = require('vn-loopback/server/server');
+
+describe('claim isEditable()', () => {
+    const salesPerdonId = 18;
+    const salesAssistantId = 21;
+    it('should return false if the given claim does not exist', async() => {
+        let ctx = {req: {accessToken: {userId: salesAssistantId}}};
+        let result = await app.models.Claim.isEditable(ctx, 99999);
+
+        expect(result).toEqual(false);
+    });
+
+    it('should not be able to edit a resolved claim for a salesPerson', async() => {
+        let ctx = {req: {accessToken: {userId: salesPerdonId}}};
+        let result = await app.models.Claim.isEditable(ctx, 4);
+
+        expect(result).toEqual(false);
+    });
+
+    it('should be able to edit a resolved claim for a salesAssistant', async() => {
+        let ctx = {req: {accessToken: {userId: salesAssistantId}}};
+        let result = await app.models.Claim.isEditable(ctx, 4);
+
+        expect(result).toEqual(true);
+    });
+
+    it('should be able to edit a claim for a salesAssistant', async() => {
+        let ctx = {req: {accessToken: {userId: salesPerdonId}}};
+        let result = await app.models.Claim.isEditable(ctx, 1);
+
+        expect(result).toEqual(true);
+    });
+});
diff --git a/modules/claim/back/models/claim-beginning.js b/modules/claim/back/models/claim-beginning.js
index 839044112..19e5eb4eb 100644
--- a/modules/claim/back/models/claim-beginning.js
+++ b/modules/claim/back/models/claim-beginning.js
@@ -1,7 +1,30 @@
+
+const UserError = require('vn-loopback/util/user-error');
+const LoopBackContext = require('loopback-context');
+
 module.exports = Self => {
     require('../methods/claim-beginning/importToNewRefundTicket')(Self);
 
     Self.validatesUniquenessOf('saleFk', {
         message: `A claim with that sale already exists`
     });
+
+    Self.observe('before save', async ctx => {
+        if (ctx.isNewInstance) return;
+        await claimIsEditable(ctx);
+    });
+
+    Self.observe('before delete', async ctx => {
+        if (ctx.isNewInstance) return;
+        await claimIsEditable(ctx);
+    });
+
+    async function claimIsEditable(ctx) {
+        const loopBackContext = LoopBackContext.getCurrentContext();
+        const httpCtx = {req: loopBackContext.active};
+        const isEditable = await Self.app.models.Claim.isEditable(httpCtx, ctx.where.id);
+
+        if (!isEditable)
+            throw new UserError(`The current claim can't be modified`);
+    }
 };
diff --git a/modules/claim/back/models/claim.js b/modules/claim/back/models/claim.js
index 234a95434..fba11cfb6 100644
--- a/modules/claim/back/models/claim.js
+++ b/modules/claim/back/models/claim.js
@@ -6,4 +6,5 @@ module.exports = Self => {
     require('../methods/claim/regularizeClaim')(Self);
     require('../methods/claim/uploadFile')(Self);
     require('../methods/claim/updateClaimAction')(Self);
+    require('../methods/claim/isEditable')(Self);
 };
diff --git a/modules/claim/front/detail/index.html b/modules/claim/front/detail/index.html
index 6061146c3..9af8fd328 100644
--- a/modules/claim/front/detail/index.html
+++ b/modules/claim/front/detail/index.html
@@ -40,6 +40,7 @@
                     <vn-input-number
                         min="0"
                         step="1"
+                        disabled="!$ctrl.isRewritable"
                         ng-model="saleClaimed.quantity"
                         on-change="$ctrl.setClaimedQuantity(saleClaimed.id, saleClaimed.quantity)"
                         class="dense">
@@ -66,6 +67,7 @@
                 <vn-td shrink>
                     <vn-icon-button
                         vn-tooltip="Remove sale"
+                        ng-if ="$ctrl.isRewritable"
                         icon="delete"
                         ng-click="$ctrl.deleteClaimedSale($index)"
                         tabindex="-1">
@@ -76,9 +78,13 @@
     </vn-table>
     </vn-card>
 </vn-data-viewer>
-<a ng-click="$ctrl.openAddSalesDialog()" vn-tooltip="Add sale item" vn-bind="+" fixed-bottom-right>
-    <vn-float-button icon="add"></vn-float-button>
-</a>
+<vn-float-button 
+    icon="add"
+    ng-if="$ctrl.isRewritable"
+    ng-click="$ctrl.openAddSalesDialog()"   
+    vn-tooltip="Add sale item" vn-bind="+" 
+    fixed-bottom-right>
+</vn-float-button>
 <!-- Add Lines Dialog -->
 <vn-dialog vn-id="add-sales" class="modal-form">
     <tpl-title>
diff --git a/modules/claim/front/detail/index.js b/modules/claim/front/detail/index.js
index 591072e6e..d84090e52 100644
--- a/modules/claim/front/detail/index.js
+++ b/modules/claim/front/detail/index.js
@@ -28,6 +28,7 @@ class Controller extends Section {
         if (value) {
             this.calculateTotals();
             this.isClaimEditable();
+            this.isTicketEditable();
         }
     }
 
@@ -134,7 +135,7 @@ class Controller extends Section {
         });
     }
 
-    isClaimEditable() {
+    isTicketEditable() {
         if (!this.claim) return;
 
         this.$http.get(`Tickets/${this.claim.ticketFk}/isEditable`).then(res => {
@@ -142,6 +143,14 @@ class Controller extends Section {
         });
     }
 
+    isClaimEditable() {
+        if (!this.claim) return;
+
+        this.$http.get(`Claims/${this.claim.id}/isEditable`).then(res => {
+            this.isRewritable = res.data;
+        });
+    }
+
     updateDiscount() {
         const claimedSale = this.saleClaimed.sale;
         if (this.newDiscount != claimedSale.discount) {
diff --git a/modules/claim/front/detail/index.spec.js b/modules/claim/front/detail/index.spec.js
index d2c319f5b..5004ba7a1 100644
--- a/modules/claim/front/detail/index.spec.js
+++ b/modules/claim/front/detail/index.spec.js
@@ -17,9 +17,13 @@ describe('claim', () => {
             $httpBackend = _$httpBackend_;
             $httpBackend.whenGET('Claims/ClaimBeginnings').respond({});
             $httpBackend.whenGET(`Tickets/1/isEditable`).respond(true);
+            $httpBackend.whenGET(`Claims/2/isEditable`).respond(true);
             const $element = angular.element('<vn-claim-detail></vn-claim-detail>');
             controller = $componentController('vnClaimDetail', {$element, $scope});
-            controller.claim = {ticketFk: 1};
+            controller.claim = {
+                ticketFk: 1,
+                id: 2}
+            ;
             controller.salesToClaim = [{saleFk: 1}, {saleFk: 2}];
             controller.salesClaimed = [{id: 1, sale: {}}];
             controller.$.model = crudModel;
@@ -125,9 +129,9 @@ describe('claim', () => {
             });
         });
 
-        describe('isClaimEditable()', () => {
-            it('should check if the claim is editable', () => {
-                controller.isClaimEditable();
+        describe('isTicketEditable()', () => {
+            it('should check if the ticket assigned to the claim is editable', () => {
+                controller.isTicketEditable();
                 $httpBackend.flush();
 
                 expect(controller.isEditable).toBeTruthy();
diff --git a/modules/claim/front/locale/es.yml b/modules/claim/front/locale/es.yml
index 338342eb5..8dae33272 100644
--- a/modules/claim/front/locale/es.yml
+++ b/modules/claim/front/locale/es.yml
@@ -15,5 +15,4 @@ Show Pickup order: Ver orden de recogida
 Search claim by id or client name: Buscar reclamaciones por identificador o nombre de cliente
 Claim deleted!: Reclamación eliminada!
 claim: reclamación
-Photos: Fotos
-
+Photos: Fotos
\ No newline at end of file